"""
赋值运算符
    = += -= *= /= //= **=  %=

逻辑运算符
    and or not
    and 两边都为真，才为真
    or  两边都为假，才为假

"""
a = 3
b = a
print(b)

a += 6  # a= a+6
print(a)
a //= 2
print(a)

c= 89
d= 67
print(f"都是90分以上：{c>=90 and d>=90}")
print(f"有90分以上：{c>=90 or d>=90}")
print(f"及格{not c<60}")


